Moving body detection system

1. A moving body detection method for transmitting and receiving signals in such a manner that moving bodies can detect each other comprising: identifying a type of moving body to which a body belongs; transmitting an ID code for identifying a moving body and giving the moving body a priority with respect to each type as an ID code of a fixed period; receiving ID code signals for each moving body from other moving bodies; determining an ID code received from a moving body to determine if a neighboring upper order moving boy belongs to the same type; determining if an ID code of a higher order than a moving body is present or not within a prescribed distance; determining the presence of a moving body of a same type neighboring upper order moving body; and transmitting a response signal only when a same type neighboring upper order moving body is determined not to be present when a detection signal transmitted from a detection side moving body is received.

2. The moving body detection method for transmitting and receiving signals in such a manner that moving bodies can detect each other according to claim 1 , wherein a second moving body receiving a detection signal transmitted by a first moving body transmits a response signal with respect to the detection signal except in the case where a response signal transmitted previously by a third moving body within a prescribed distance from the second moving body is received by the second moving body.

3. The moving body detection method according to claim 2 , wherein a type code identifying the type of a moving body is included in the response signal, and the second moving body transmits a response signal with respect to the detection signal with the exception of the case where a response signal from the second moving body has already been received from a third moving body belonging to the same type as the second moving body.

4. The moving body detection method according to claim 3 , wherein a moving body receiving the detection signal measures the distance to the moving body transmitting the response signal based on the received response signal.

5. A moving body detection method having a detection system for transmitting and receiving signals in such a manner that moving bodies can detect each other comprising: transmitting an ID code for each moving body for identifying the moving body itself and giving a priority to the moving body as an ID code signal of a fixed time period; receiving said ID code signals by each moving body from other moving bodies; determining an ID code signal received by each moving body to determine if a neighboring upper order moving body of a higher order than itself is present within a prescribed distance; determining the presence of a neighboring upper order moving body when receiving a detection signal transmitted from a detection side moving body; and transmitting a response signal only when the neighboring upper order moving body is determined not to be present.

6. A moving body detection system for transmitting and receiving signals in such a manner that moving bodies can detect each other comprising: an ID code transmitted by each moving body for identifying itself and giving a priority to the moving body; a transmission circuit for transmitting said ID codes to other moving bodies; a receiving circuit for receiving said ID codes from other moving bodies; a first detector for determining a distance to other moving bodies; a second detector for determining an order of ID codes moving between bodies; wherein each moving body transmits an ID code for identifying the moving body itself and giving a priority to the moving body as an ID code signal of a fixed time period, each moving body receives said ID code signals of other moving bodies, each moving body, upon receiving an ID code signal, makes a determination as to whether or not a neighboring upper order moving body of a higher order than itself is present within a prescribed distance, and each moving body, upon receiving a detection signal transmitted from a detection side moving body, determines the presence of a neighboring upper order moving body and transmits a response signal only when the neighboring upper order moving body is determined not to be present.

7. A moving body detection system for transmitting and receiving signals in such a manner that moving bodies can detect each other comprising: an ID code transmitted by each moving body for identifying itself and giving a priority to the moving body; a self-classification code identifying a vehicle type being placed on the ID code signal for each moving body; a communications control circuit; a transmission circuit for transmitting said ID codes to other moving bodies; a receiving circuit for receiving said ID codes from other moving bodies; a first detector for determining a distance to other moving bodies; a second detector for determining an order of ID codes between moving bodies; wherein each moving body is capable of identifying a type to which it itself belongs and transmits an ID code for identifying itself and giving itself a priority to each type as an ID code signal of a fixed time period, each moving body receives said ID code signals from other moving bodies, each moving body, upon receiving an ID code signal, makes a determination as to whether or not a neighboring upper order moving body belonging to a same type and of a higher order than itself is present within a prescribed distance, and said communications control circuit of each moving body, upon receiving a detection signal transmitted from a detection side moving body, determines the presence of a same type neighboring upper order moving body and transmits a response signal only when a same type neighboring upper order moving body is determined not to be present.

8. The moving body detection system for transmitting and receiving signals in such a manner that moving bodies can detect each other according to claim 7 , wherein a second moving body receiving a detection signal transmitted by a first moving body transmits a response signal with respect to the detection signal except in the case where a response signal transmitted previously by a third moving body within a prescribed distance from the second moving body is received by the second moving body.

9. The moving body detection system according to claim 8 , wherein a type code identifying the type of a moving body is included in the response signal, and the second moving body transmits a response signal with respect to the detection signal with the exception of the case where a response signal from the second moving body has already been received from a third moving body belonging to the same type as the second moving body.

10. The moving body detection system according to claim 9 , wherein a moving body receiving the detection signal measures the distance to the moving body transmitting the response signal based on the received response signal.